I started commuting twice a week on my bike. After a while, I noticed there was another bike. One with a big battery pack and a motor. Then there was a second battery-powerd bike, a "Power Bike". Today there was a third bike, a regular mountain bike like I have.
Seems like maybe I've started a bike commuting trend. I imagine those battery powered bikes are because some people come from far away or something. The office is quite out of the way, and at the top of a rather strenuous hill.
Anyway, I think that is rather cool.